Doweling-machine.



J. R. FRANTZ.

DOWELING MACHINE.

APPLICATION man Aue. lo. 1911.

Patented May 4, 1915.

7 SHEETS-SHEET l n l L l. R. FRANTZ.

DOWELING MACHINE.

APPLICATION FILED Aueno. |911.

J. R. FRANTZ.

DOWELING MACHINE.

APPLICATION FILED Aue.10.1911.

Patented May 4, 1915.

TSHEES-SHEET 3.

hmmm.,

l. R. FRANTZ.

DOWELING MACHINE.

APPLICATION man ^ue.1o`|911.

Patented May 4, 1915.

ISHEETS-SHEET 4.

l. R. FRANTZ.

DOWELING MACHINE.

APPucATloN FILED Ammo. 19u.

Patented May 4,1915.

7 SHEETS-SHEET 5.

, @Mgg .mi

' R. FRANTZ.

DOWELING MACHINE.

APPucmoN man Ammo. |911.

Patented May 4, 1915.

ISHEETS-SHEET 6.

MIU

v @m @w @www J. R. FRANTZ.

DOWELING MACHINE.

APPLICATION min Ammo. |911.

1,137,854. K Patented May 4, 1915.

1 SHEETS-SHEET I.

JOHN n; rnaNrz, or' osHxosH, w'IscoNsIN, Ass'IeNon 'ro E. n. HAYES MACHINE COMPANY, or osHHosH, WISCONSIN, A CORPORATION or WISCONSIN.

DOWELING-MCHINE.

To all whom it may concern.'

Be it known that 1,'JOHNR. FiiAN'rz, al

` acter, capable of automatically handling the ously on three successive pieces ofstock that is after the machine has been fully started' stock in the different operations.

Speakin more specifically, one of' the principal o jects or features of my invention is the provision of a machine, as a unitary structure, for automatically and successively boring, gluing and-doweling the stock, such stock being fed automatically from-a suitable hopper, first to the boring mechanism for boring the dowel holes, second to the gluing mechanism for introducing the glue into the holes and third to the dowelingl mechanism for the applying and driving of the dowels into the glued holes, fromwhich latter mechanism the stock is discharged from the machine as a completed article. 1t will be understood that thethree different operations referred to are performed simultanein operation there are three' pieces of stock being operated upon' atl one andv the same time, the first being bored,the second glued and the third having its'doWels applied and driven in, the machine herein illustrated being capable of' acting upon both endsi of the stock simultaneously.l It will be obvious that the number of these mechanisms may-be increased so that the machine may act simultaneously on more than three pieces but the within disclosure will be suiicient vfor an understanding of the nature and principles of my machine.

Another principal objectof my invention is to provide novel and eflicient mechanism for performing the said three operations and for adjusting them as-to time of-operation and extent of movement -or throw. In

addition the gluing mechanism'isl provided with a yielding driving connectionY for the gluing ldevices to avoid breakage vor injury thereto in case of the obstruction of a hole f Specification of Letters Patent.

-line 14.-'14 of Fig. 2.;

Patented May 4, 1915.

Application led August 10, 1911. Serial No. 643,428.

as will 'be apparent from the descriptionv hereinafter given. A

In the drawings Figure 1 isa perspective of Amy machine; Fig. 2 a plan view thereof; Fig. 3 anelevation of the right-hand end of the machine shown in Fig.' 2; Fig. 4' a sec'- tionalv detail on the lined- 4 of Fig. 3;.Fig. 5 a side'elevation of the machine; Fi 6 a' sectional elevation onithe line 6 6 o 2 looking in the direction of the arrow; Fig. 7 a sectional detail von the' line 7 7 of Fig. 2

but on'a considerably larger scale; Fig.l 8 a sectional ,elevation on the irregular lineV8--8v of Fig.2; Fig. 9 a detail view of the means for adJusting the push bar for the feed dogs; Figs.y 10 a section on the line 10-10 of Fig` 2; Fig. 11i a section on the line 11-11 of Fig. 10; Figs. 12gand 13 detail views of the dowel hopper; Fil` 14 a section on the igs. 15 and 16 detail views of the clamping bar; and Fig. 17 a detail view of one of the feed dogs.

Before describing my machine in detail 1 will statethatthe saine as herein shown is ofV a duplexl character capable ofl simultanef ously 'acting upon opposite ends of the rails as to all of the three operations aforesaid although it will be 1understood that my iiivention in its broader charactermay be em`` bodied in amachine capable of operating upon only one end`of thevstock at one time. Speaking'of the machine as illustrated herein that is thelduplexmachine the'saine` is provided with two bases preferably' mounted I,upon a single floor bed and one of which is capable of-adjustment tovva'idar'id i away from :the other 'for accommodating stockof different lengths. Each base'cariis i the three different mechanisms, toi wia-the boring mechanism, the gluin mechanism and the dowel driving'm'echanismin theol'` der named. The general location ofthse mechanisms is indicated by" the-referenceL soY letters A, B and C. The rails are piled up inthe supply hopper one upon the other and are fed to the machine from the bottom of the pile by means of intermittently operated feed dogs which slide the lowermost rail from the pile inwardly toward the-ma-` chine and then stop with the rail in proper position to be acted upon by the drills of the boring mechanism.` The next movement of the feed dogs advances this rail to the gluing mechanism and simultaneously slides the second rail from the bottom of the pile to the boring mechanism so thatsimultaneously the first rail isglued and the second bored. The next movement of the feed dogs advances the rst and second rails one step farther whereupon the first mentioned rail is now in position for action by the dowel driving mechanism* the second in position for action by the gluing mechanism and a third rail, which has just been slid from the bottom of the pile, is in position for action by the boring mechanism. This operation proceeds. automatically. and successively and i g5 the completed rails or strips are discharged from the machine. Provision is made for vertically adjusting the feed mechanism in order to present the stock in the proper hori- Zontal plane for action by said different mechanisms and moreover such feed mechanism is provided with another adjustment whereby the stock may be properly presented to the different mechanisms with respect to its lateral position with reference thereto, thereby providing for adjustment of the distance of the holes from one edge of the rail, the centers of the drills or bits as well as o f the gluing lingers and drivers being fixed in the present instance but not necessarily so. The machine is also provided with a-clamping bar for engaging'and clamping the stock or rail while being operated, upon.

-Now referring specifically to the machine as herein shown the same is provided with a ioor bed 1 on which are mounted to slide the two bases 2, these bases rising vertically from the floor bed in the nature of av frame for supporting the various mechanisms here- .50 inafter described. Inasmuch as the mechanisms mounted upon and supported vby these bases are duplicates it will be understood that a description of one set, that is the mechanism on one ofthe bases, will apply to both and consequently the correjustable base eitherby hand or power and to this end I provided a long horizontal screw 5 mounted at its right-hand end portion, Figs. 2 and 5, in the right-hand base and screw threaded into a part of theI lefthand base with the result that upon rotation of the screw the left-hand base is adjusted according to the direction of movement of the screw. This screw is provided with a hand Wheel 6 for hand adjustment 75 and also with a friction clutch 7 splined i upon the screw and arranged to be brought into engagement by means Aof the clutch shifter 8, Fig. 3, with either .the pulley 9 or 10, Fig. 4, accordingly as it is desired to 30 adjust the base in one direction or the other. These two pulleys 9 and 10 are mounted loosely upon the screw 5 and are driven by Abelts 11 from pulleys 12 on the main shaft 3.

The machine is provided with a second g5 main driving shaft 13 extending horizontally from end to end of the machine and serving as a part of the driving connections for the gluing mechanism, dowel driving mechanism and the clamping bar. shaft is driven from the main shaft 3 by means of the two pulle s 14 and 15, connecting belt 16, pinion 1 on the same shaft 18 as the pulley 15,` and gear 19 secured to said shaft 13. This latter shaft is caused to be driven by the operator by manipulating the lever 20 at the front of the machine, Figs. 3 and 6, the movement of such lever being communicated to a belt tightener 21 coperating with the belt 16. As'shown in Figs. 2, 3, 5 and 6 this lever which coperates with the quadrant 22 is secured at its lower end to a rock shaft 23 journaled in the front side of the right-hand base and provided at one end with the rock arm 24, the belt tightener 21 hcreinbefore referred to and which is in the frm of a roller beticularly in Figs. 2, 3 and 5 the shaft' 13 has 115 a bevel gear 26 meshing with a bevel pinion 27 secured to the lower end of a short vertical shaft 28 mounted in the end .of the base and having a bevel pinion29 at its upper end. This latter pinion meshes with a bevel gear 30 secured to the main cross shaft 25 for driving the same. Having now described the main operating or driving connections and the bases or frame of the machine I will proceed to describe the boring mechanism, the gluing mechanism and the dowel driving mechanism, in the order named.

The boring mechanism-Each base-has a boringmechanism which as shown more par- 13o This 90 usages ticularly in Fig. 2 comprises a carriage 31 for the arbors 32 of a series of bits 33 which are in the present instance four in number and arranged in the same horizontal plane. These arbors are suitably journaled in bearings 34 on said carriage and are provided intermediate their length with a series of intermeshing pinions 35. The foremost arbor lof the set is extended at 36 and journaled at its outer end in the bearing 37. This extended portion of the arbor is provided with a pinion 38 meshing with a gear 39 secured to the main shaft 3, Fig. 5. By the rotation of this latter shaft the pinion 38 and consequently the series of pinions 35 are rotated, thereby rotating the bits 33. It will be understood that the extended portion 36 of the arboris movable longitudinally in the bearing 37 during the reciproeating movements of the carnage 31.

The carriage V`is reciprocated by operating connections with the cross shaft 25, the same being shown on the left-hand side of Fig. 8., Projecting laterally upon the carriage-is a bracket 40 carrying at its lower end a roller 41 adapted to coperate with a cam 42 secured to the shaft 25 and with anactuating rock arm 43. The cam 42 is adapted to force carriage and bits inwardly during the boring operation and the arm 43 is adapted to retract such carriage and bits. This arm is operated by means of a second cam 44 also secured to the shaft 25 and adapted to contact a cam roller 45 journaled in the outer end of an arm 46 secured to the same rock shaft 47 to which the lower end of the rock arm 43 is fastened, it beingunderstood that the rock shaft 47 is suitably journaled on one endf of the base. It is evident that after the cam 42 has passed or cleared the roller 41 the other cam 44 will operate the rockarms so as to cause the arm 43to bear against the roller 41 and thereby retract the carriage and bits.

In order to adjust the range of throw of the carriage and bits I provide a suitable adjustment by suitably connecting the bracket or plate 40 with the carriage through a bolt and slot connection, the bolt being indicated at 48 and the slot at 49 and I also rovide an adjusting screw 50 adapted to iiearagain'st the inner end of the bracket for moving or adjusting it to a nicety.

The gluing meckam'sm.'-The gluing mechanism which is next in order after the bor'- ing mechanism is more particularly illustrated in Figs. 2, 8 (right-hand side) and 12. This mechanism comprises a series ofk glue fingers 51 which are here four in number and secured in the chuck portions of spindles or arbors 52 and journaled to rotate in one member of a U-shaped frame or yokel 53 which is pivoted by means of a shaft 54 to another yoke 55. This shaft 54 is provided with a bevel pinion 56 meshing with a bevel pinion 57 secured to one of the spindles or arbors 52, the rotary motion being transmitted to the other spindle through the series of intermeshing pinions 58 secured to said spindles. At one end the shaft 54 is provided with a pinion 59 meshing with a rack 60 upon the top of the base plate with the result that as the yokes are reciprocated in the manner hereinafter described the meshing of the pinion 59 upon the rack will cause a rotation of the glue fingers,- such rotation taking place vduring the actual operation of the introduction of the glue into the holes by means of the fingers. The'yoke 55 is secured to or forms a part of a reciprocating plate 61 adapted to slide in a block 62 which is here shown as solid with a carriage adapted to reciprocate or slide upon the top of the base of the machine. This ,block is provided with a yoke 63 between which and a lug 64 on the yoke 61 is interposed a spring 65, such spring being keptn position by means ofthe bolt 66, as shown in Fig. 8.y lThe parts described particularlyv vgers-1n event that one or more of the bits are broken -ofi' and left in the holes in the rails, 1t being understood that in case one of the glue fingers should strike such broken bit, the linger frame would not be advanced farther but the continued movement of the drivingparts would be taken up by means of the spring 65'.

In the upper portion of the base and be-v low the g uing mechanism is arranged a glue vat or receptacle' 67 into which the glue fingers are adapted to automatically dip to receive a fresh supply of glue for each of its operations. In order to'provide for the .dipping or oscillating movement of the fingers such lingers and their spindles are mounted as above described that is in the yoke 53 which is adapted to oscillate on the shaft 54v as an axis. When the gluing mechanism as a whole is withdrawn that .is moved outwardl f away from the 'stock the yoke 53 is moved downwardly thereby oscillating the fingers and dipping them into the glue. This operation is automatic through the following means: This yoke `53 is eX- tended at one side at 532l and is provided with a roller 68 'adapted to coperate with a bar 69 secured to thetop of the base and having its under surface formed of irregular shape to constitute acam surface for the roller 68. When the gluing mechanism .as a whole has been withdrawn to such an eX- vtent,v that the roller 68 arrives at the in- 53 land the glue fingers will swing 'downwardly by gravity, being overbalanced at their lnner ends. At this time the lue fingers arev at such a position as to c ear the outer or free end a roller 72, with which coinner end of the glue vat or tank and will dip into the glue and become coated therewith. The movement of the entire luing mechanism in the opposite direction t at is inwardly will cause a reversal of operation, that is to say, the cam surface 69 will cause a swinging of the glue fingers upwardly to the horizontal position and a continued movement of the mechanism will force the glue fingers into the holes in the I 'ail previously bored by the boring mechanism.

The block 62 is secured to or forms a part of the carriage 70 which is mounted to slide in a slideway in thetop surface of the base of the machine. This carriage is reciprocated by suitable driving connections with the main cross shaft 25. As shown more particularly in Figs. 8 and 12 these driving connections which are substantially the same as those for operating the carriage of the boring mechanism, comprise a bracket 71 adjustably connected with the carriage by bolt and slot connections and carrying at its operate the cam 73 and rock arm 74. This cam is secured to the main cross shaft 25 and is adapted to force the carriage inwardly whereas the rock arm 74: is adaptcd to retract such carriage. This arm together with arm 76 forming part of the same structure is mounted to rock upon a fixed pin 75, the arm 76 carrying at its outer end a roller 77 adapted to be contacted by a cam finger 78. By contact of this latter cam with the roller the rock arm 74 is moved in a clock-wise direction (Fig. 12) thereby retracting the carriage.

The dowel driving mechanism.-This mechanism which is more particularly illustrated in Figs. 2, 10 and 1l comprises a reciprocating carriage 79 adapted to slide in slideways at the top surface of the base and carrying at -its inner end a series of dowel drivers 80 which are here four in number. These drivers which are adjustably secured to the vertical bracket 79a at the inner end of the carriage are adapted to pass through the dowel hopper at or near the bottom thereof and kto force dowels in front of them and into the holes previously bored and glued by this machine as hereinbefore described. The hopper comprises a receptacle `of suitable shape and dimensions consisting of a'bottom 81, opposite sides or ends 82, a back 83 and a front 84, the latter of which will be moreparticularly described hereinafter, Whose bottom 81 is secured to the top surface of the base of the machine and provided with a series of slots-85 (four in number in the present instance) to receive the dowels to be driven. Between the slots 85, there rise from said bottom a series of vertical partitions 86 forming in connection with each other and with the ends 82 of the hopper vertical continuations of the slots.

Athrough the openings 87 formed on the front 84 of the hopper at the base of the slots, the drivers 80 which act as plungers entering corresponding openings 88 in the back 83 of the hopper, Figs. 6, 10 and 11. In order to keep the dowels fed straight into the slots I prefer to provide some agitating means such as the movable agitators 89 atthe upper end of the partitions 86 which latter are provided with vertical holes through which pass the agitator pins 90. These pins are secured at their upper ends to the agitators and at their lower endsl to a horizontal plate 91, the pins passing through the bottom ofthe hopper and the plate being located below the top surface of the base of the machine. Below such surface is pivoted a lever 92 of the first class the inner end thereof being located below and in proximity to the plate 91 so as to contact the latter and thereby operate the agitators. Theother end of the lever has an irregular or cam shaped upper surface 92a which coperates with a roller 93 journaled in a bracket or bearing 94 depending from the under side of the carriage 79, Fig. 10. The reciprocating movements of this carriage automatically agitate or move the lever 92 and irregular movements or agitations are communicated tothe agitators 89 by means of the plate 91 and the pins 90. The baseof the hopper is preferably provided on its inner side adjacent the path of travel of the rail with a projection or flange 87 which supports the dowels as they are driven from the hopper and into the dowel holes in the rails, Figs. 2 and 10.

By preference andas herein shown the dowel hopper is provided at its front side with a safety means to prevent accident or breakage in case of clogging of any of the dowels. Referring to Figs. 12 and 13 the lower portion 84:2l of the front side of the hopper is pivoted at its upper end upon the pintle 95 mounted upon the hopper, so as to swing outwardly as a door against the re sistance of the 'springs 96. These springs are securedrespectively to the door and to the sides of the hopper and tendto hold the door closed. It is evident that in case the dowels should become clogged as the drivers start to drive them (the clogging preventing their being driven through the outlet holes) the door will automatically open and allow the` clogged dowels or any broken or bad pieces to come out, thereby preventing injury to or breakage of the hopper or drivers. Moreover, this arrangement permits the operator to open the door at any time he desires to straighten out the dowels. Furthermore, the entire back 83 of the hopper is plates-105 between the two sets of mechareadily removable by loosening the bolts 33 thereby giving the operator access to the whole interior of the hopper. r

As shown in Fig. 10 lthe carriage 79 is reciprocated by driving connections with the main cross shaft 25 in substantiallyl the same manner as the carriages for the boringkand gluing mechanism, such connections i coinprising a bracket 97 adjustable on the curriage 79 by bolt and slot connection aridlhaving a roller 98 with which coperates a cam 99 and a rock arm 100. This cam isjsecured to the cross shaft 25 and is adapted 'to "move the carriage 79 inwardly. The rock arm 100 which is adapted to retract the carriage or move it to the right (Fig. 10) together with a short arm 95 forming part of the same structure is mounted upon a fixed vpin 101, the arm 102 being provided at its outer end with a roller 103. This roller is operated by means of a cam finger 104 which is secured to the shaft 25. Contact of this linger with the roller 103 rocks the arm 102 and consequently the arm 100, thereby retracting the carriage 79. By preference one side 0f the dovetail ways or gibs for all the .carrliages is adjustable to take care of wear on s1 e.

Having now described the boring, gluing and dowel driving mechanisms I will pro ceed to describe the feeding mechanism for feeding the rails automatically-and successively from the hopper to eachof said mech- The rail feeding mechanism-ln the duplex formv of machine herein described in which bothends of the rail are operated upon simultaneously by the several different mechanisms above described the rails are fed from the hopper formed by the upright nisms and finally discharged from the .oplposite side of the machine. In this partie ar machine each of the two bases has similar feeding mechanism each of which acts upon the rails simultaneously near opposite ends j thereof. A description of one feeding mechanism will therefore apply lto both. -Referring more particularly to Figs. 2, 5 and 6 a plate or beam 106 is arranged in a horizontal position vadjacent to Vand below the plane of the'bits, glue lingers and dowel drivers when in action, such beam forming a guide and support for the stop as it is fed across the machine. This beam has a depending portion 106a which iskmounted to slide vertically for vertical adjustment upon a projecting portion 2a of the base, Fig. 5. The -lower end of this depending portion of the beam is provided with projections or lugs 107 having screw threaded holes to receive adjusting screws v108 carrying at their of the machine. These bevel pinions mesh with bevel gears 111 secured to a horizontal shaft 112j'ournaie'd'in bearings 118 on'the sidcof the base andA actuated by the hand wheel' 114. It is obvious that bd); the rotation of this 'hand-wheel in one 'rection or the other the ventire beam will be raised or lowered as Ythe case may b e s oas tof roperly present the ,stock to 'the different mec anisms in proper position.

The barl or beam 106 is dove-tailedV on one side toV receive a sliding bar 1`15'which'is adated to'reciprocate inthe beam in a horizon al direction by driving connections hereinafter described. This .sliding bar is itself 9 `the dogcarrier is tur-ned at right angles at one end to "form a flange 116a through which passes .an adjusting screw 117 which enters .a screw threaded hole in ,one endof the-sliding bar 115. By turning this screw in one direction or the other the relative position of the bar 115y and dog carrier 116-may be adjusted, thereby resulting in different amounts of throw and place of positioning ofthe rails by the dogs, enabling the dowelstobe llocated at the desired distances from the side edges of the rails.

Upon one side 0f the dog .carrier are pivotedv 0,11r 'the studs 118 aser-ies of dogs 119 whichare here Ifour in number. As shown more l'particularly Iin Figs. 6 and 1,5 each dog is of irregular form comprising an upwardly projecting and inclined portion 119"1 normally extending into the path of movement of .the rails and a lmain portion 11.9" of lblock Vformation and heavier than said projecting portion, so that by gravity such projecting portion is normally held into the path of feed .of the rails. lEach dog is recessed. at one side at 119 to form a shoulder acting aS a stop in connection with a pin 120 projecting laterally of the 'dog carrier. It will be understood that these dogs are properly spaced apart according to the width of the rails being fed through the machines, each dog with the exception of the last dog on the 'left in Fig. 6 being here shown in -position to contact the front side of a rail.

Thedriving connections for reciprocating the sliding bar 116 are -here shown as comprising a gear- .wheel 121 journaled on one side of the base of the machine and driven by'a pinion 122 mounted on the main shaft 13, and adapted to actuate -a rocker arm 123 which is operatively connected by means of the vlink 124 with the bar 116. y The gear wheel `121 is provided Witlra crank pin 125 havingy a block 126 adaptedtotravel in the slot 123a of the rockerl arm. This rocker arm is pivQtad at its lower end at 1.27 yon the base i of the machine and the construction and arran ement is such that the vrotary movement of t e gear wheel is translated into a reciprocating'motion by means of the rocker arm and the connecting link. y

In the position of parts illustrated in Fig.

` 6 the dogs have fed the rails. to positions for It being understood that the railsare llso i tal slots 105. Of course the adjustment ofl stacked -or piled one above the other in the hopper at the right (Fig. 6) as shown by dotted lines, the last dog on the right will jump upwardly as soon as it has cleared the right-hand side or edge of the lowermost rail of the pile and will be in a positin'to;

engage said side. At the Sametime the other three dogs will engage on the-righthand Side or edge of the three rails just acted upon by the three mechanisms A, B

and C. Further operation of the driving mechanism will reciprocate the bar 116 toward the left with the result that a new rail will be fed from the pile in the hopper, the complete rail will be discharged and the other two rails will be moved one position or station to the left for an additional treatment. matic manner so long as the hopper is kept supplied with rails and in the form of machine herein shown both ends of the rails will be acted upon simultaneously. To accommodate different widths of rails the hopper is provided with guides 128 which are adjustable toward or away from each other on the plates 105 of the hopper and held in adjusted position by means of clamping bolts 129 slidable in the horizonthe hopper for different lengths of rail is obtained by merely adjusting the left-hand base (Fig. 2) toward or away from the stationary basel In order to hold the rails firmly in position while being acted upon I provide clamping mechanism which will now be described.

The clamping mechanism-Each base is provided with a clamping mechanism which is similar in construction and' operation. Each of these mechanisms consists of a' beam or frame 130 pivoted upon a cross lli provided at one end with the adjusting This operation continues in auto-l lhaving' 'an adjusting nut 147,

weights 134 but the pressure which is applied by the clamping bar 1s caused in a positive manner by means of the two cams 135 secured to the main cross shaft 25, Fig. 3. Each cam coperates with `a camroller 136 depending from a corner of the beam with the result that Such beam is rocked and its clamping bar forced downwardly upon the rails at the'proper'time by reason of the peculiar formation of the cam, Fig. 5, the releasing of the clamping action being obtained by gravity due to the weighted outer end of the beam.

` In order to provide for stock of different thicknesses, the amount of movement of the clamping bar is adjustable and to obtain this result the cam rollers 136 are vertically adjustable in their supports or bearings in the beam.y As shown in Fig. 7 each ycam vroller is journaled in the 'lowery end of a bearing 137 whose upper endris in the form of'a tube vertically movable in a portion of by means of the cross pin 138. This tube is interiorly screw threaded to receive an adjustingscrew 139 j ournaled on the beam `and provided at its upper end with a bevel pin` ion 140 adapted to mesh with a similar pinion 141 `which is secured to a shaft or rod 142 journaled .in the beam and extending transversely thereof. A hand wheel 143 is secured to this shaft at one end thereof. The

the beam but held against rotary movement j adjusting mechanism and operating connecdependent upon the adjustment of these` rollers.

By preference theclamping bar 133 is made as illustrated in detail in Figs. 15 and 16, wherein the under face thereof is shown provided with members for directly engaging the rails. Near the longitudinal edges the bar is provided with strips 144 of resilient material such as rubber and with a series of spring pressed shoes 145, of suitable number and arranged intermediate the strips and preferably along the middle line of the bar. -Each shoe which is of suitable material such as steel, cast ironfor brass is movable vertically in a recess 133a in the underside of the bar and is connected with a plunger or piston head 146 vertically movable in a chamber 133b in the bar. This plunger has a rod 147` mounted to slide in the bar and A coiled spring 148 around the rod abuts respectively against the bar and the plunger, thereby` holding the shoes outwardly with a yielding pressure. 'The construction and arrange-` feed dogs to keep them where they belong and tov prevent any overthrow or misplacing in the feeding operation. These shoes yield in the downward movement of the clamping bar and it is only substantially when the bar has been fully lowered that the rubber strlps contact the rails to hold them firmly in position for action bythe different mechanics to operate thereon.

1 claim: 1. A doweling machine comprlsing, a horizontal track for rails to be operated on, boring mechanism, gluing mechanism 'and dowel driving mechanism operating in a horizontal plane slightly above the plane of said l track which iscommon to all such mechanisms, means for operating said mechanisms, and means for feeding the rails one at a time and successively along the track to the different mechanisms.

2. A doweling machine comprising, a horizontal track for rails to be operated on, boring mechanism, gluing mechanism and' dowel driving mechanism operating in a horizontal plane slightly above the plane of said track which is common to all such mechanisms, means for operating said mechanisms, a hopper arranged in'advance of said mechanisms and arranged to receive a supply of 'rails, the lowermost one of whlch always rests upon thel track,and means for feeding the rails one at a time and successively along the track to the different mechanisms. l

3. A doweling machine comprising boring mechanism, gluing mechanism, dowel driving mechanism, a hopper arranged in advance of said mechanisms for receiving a supply of the rails, a series of'feed dogs for feeding the rails one at a time and successively from the hopper to said mechanisms respectively.

49A doweling machine comprising, as av unitary structure, boring mechanism, gluing mechanism, dowel drivlng mechanlsm, means arranged in advance of said mechanisms for feeding the stock successively from one of the mechanisms to the other, and means for operating said mechanisms.

5. A doweling machine comprising, as a unitary structure, boring mechanism, gluing mechanism, dowel driving .mechanism, all arranged in the same horizontal plane, a track common to said mechanisms, a hopper for the rails at one end of the track, and

means for feeding the rails one at a time from the hopper and along the track to said different mechanisms successively.

6. A doweling machine comprising, as a unitary structure, boring mechanism, gluing mechanism, dowel driving mechanism, all arranged in the same horizontal plane, a track commento said mechanisms, a hopper for receiving a supply of the rails one above the other, and means lfor feeding the rails one at a time from the bottom of the hopper and along the track to said different mechanisms successively.

7. A doweling machine comprising, as a unitary structure, boringmechanism, gluing mechanism, dowel driving mechanism, all arranged in the same horizontal plane, a track common to said mechanisms, a hopper for receiving a supply of the rails, anda series of four feed dogs for feeding the rails one at a time from the hopper andalong the track to the boring, gluing and dowel driving mechanisms successively.

8. A doweling machine comprising, as a unitary structure, boring mechanism, gluing mechanism, dowel driving mechanism, and a single feeding means for feeding rails to all of said mechanisms including a .series of four feed dogs for feeding the rails successively to said mechanisms respectively, said feed dogs being adjustable to change their feed position relative to said mechanisms.

9. A doweling machine comprising, as a unitary structure, boring mechanism, gluing mechanism, doweldriving mechanism, and, a single feeding means for feeding rails to all of said mechanisms including a series of four feed dogs for feeding the rails successively to said mechanisms. respectively, said feed dogs being adjustable to change their feed positions relative 'to said mechanisms.

10. A doweling machine ,comprising gluing mechanism, dowel -driving mechanism, a track common to said mechanisms, a reciprocating push bar mounted to slide in said track,`and a series of feed dogs mounted in the bar and arranged to feed the rails successively tosaid mechanisms respectively.

11. A doweling machine comprising gluing mechanism, dowel driving mechanism, a track common to'said mechanisms, a reciprocating push bar mounted to slide in the track and made in two sections adjustable upon each other, a series of feed dogs mounted upon one of the sections and arranged to feed the rails one at a time and along the track successively to said mechanisms respectively, and means for operating the bar.

12. A dowelin machine comprising gluing mechanism, owel driving mechanism, a track common to said mechanism, a reciprocating push bar mounted to slide in said track, and a series of feed dogs pivoted in track common to said mechanisms, al hopper arranged at one end of the track for receiving asupply of the rails, a reciprocating push bar, a series of feed dogs mounted on the bar and arranged to feed the rails one at a time and along the track successively from the hopper to said mechanisms respectively, 4and means for operating the bar.

14. A doweling machine comprising, as a unitary structure, boring mechanism, gluing mechanism, dowel driving mechanism, a track common to said mechanisms, a hopper arranged at one end of the track for receiving a supply of the rails, a reciprocating push'bar made in two sections adjustable upon each other, a series of feed dogs mount-v ed on one of the sections and arranged to feed the rails one at a time and along the track successively from the hopper to said mechanisms respectively, and means for operating the bar.

15. In combination with gluing and dowel driving mechanisms, a main bar arranged adjacent said mechanisms and cooperating with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, and rail feeding means on the reciprocating bar.

16. In combination with gluing and dowel driving mechanisms, a main bar arranged adjacent said mechanisms and coperating with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, said second bar being made in two sections adjustable on i each other, driving connections cooperating with one of the sections, and feed dogs mounted on the other thereof.

17. In combination with gluing and dowel driving mechanisms, a main bar arranged adjacent said mechanisms and coperating with all of them, said bar forming a feed way for the rails, a second bar mounted tov reciprocate on the main bar, said second bar being made in'two sections slidable upon each other, an adjusting screw connecting between the two sections and arranged to adjust them relative to each other, and rail feeding means mounted upon one of the sections. l

18. In combination with gluing and dowel driving mechanisms, a main bar arranged adjacent said mechanisms and coperating with' all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, and feed dogs pivoted on the reciprocating bar and having portions normally projecting into the path of the rails.

19. In combinationwith gluingand dowel driving mechanisms, a main bar arranged adjacent said `mechanisms and coperating with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, and feed dogs 21. In combination 'with gluing and dowel4 driving mechanisms, a main bar arranged adjacent said mechanisms and coperating with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, a. slotted rock arm, a link connecting between the arm and the -reciprocating bar, a wheel having a crank slidable in the slot of the arm for rocking it, and rail feeding means on the rey ciprocating bar.

22. In combinationwith gluing and dowel driving mechanisms, a main bar arranged adjacent said mechanisms and coperating with all of them, said bar forming a feedy way for the rails, a second bar mounted to reciprocate on the main bar, rail feedingmeans on the reciprocating bar, and means for raising and lowering the main bar for adjusting the path of feed relative to said mechanisms.

23. In combination with gluing and dowel driving mechanisms, a mam bar larranged adjacent said mechanisms and coperatmg with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, rail feeding means onthe reciprocating bar, a base for supporting said mechanisms, said main bar being arranged to slide vertically on the base, and means for adjusting such main bar vertically.

24. \In combination with gluing and dowel driving mechanisms, a maln bar arranged adjacent said mechanisms and coperating with all of them, said bar forming a feed way for the rails, a second bar mounted to reciprocate on the main bar, rail feeding means onthe reciprocating bar, a base for supporting said mechanisms, said main b ar being arranged to slide verticallyv on the base, and having a depending portion, and a pair of adjusting screws coperating with such depending portion for adjusting the main bar. 25. In combination with boring, gluing and doweling mechanisms and with means for feeding rails thereto, yielding pressure means common to all of said mechanisms constantly acting upon the rails presented to and operated upon by such mechanisms.

26. In combination with boring, gluing Yll@ ` 1,1 ernste andvdoweling mechanisms and with means` for feeding rails thereto, a spring pressed shoe commonrto all of said mechanisms and arran ed to constantly press upon the rails.

27. n combination with doweling mechanism and with means for feeding rails thereto, a clamping bar, and a spring pressed shoe therein arranged to constantly press upon the rails.

28. In combination With ldoweling mechanism and with means for feeding rails thereto, a clamping bar having yielding pressure means constantly acting upon the rails, and resilient strips for contacting the rails when the bar is operated.

29. In combination with doweling mechanismand with means for feeding ralls thereto, aclamping bar, a series of spring pressed shoes therein for constantly pressing upon.

the rails, and resilient strips on the bar for contacting the rails when the bar is operated. A

30. In combination with doweling mechanism and with means'for feeding rails thereto, a clamping bar having a recess on its under side and also a connecting chamber,

a shoe movable in such recess, a plunger connected with the shoe and movable in the chamber, and a spring for holding the plunger and shoe proJected with a yielding pressure.

3l. n combination with doweling mechanism and with means for feeding rails thereto, a clamping bar having a recess on its under side, and also a connecting chamber, a shoe movable in such recess, a plunger connected with the shoe and -movable in the chamber, a bolt secured in the bar and passing through the plunger, and a spring forI holding the plunger and shoe projected with a yielding pressure. v

32. In combination with doweling mechanism and with means for feeding rails thereto, a clamping bar, a series of spring pressed shoes arranged along substantially the middle line of the under side of the bar, and a resilient strip arranged on either side of the I shoes. Y

JOHN R. FRANT Witnesses:

" CARL REISE, 

